US20120182151A1 - Server rack having payload weighing function - Google Patents
Server rack having payload weighing function Download PDFInfo
- Publication number
- US20120182151A1 US20120182151A1 US13/085,439 US201113085439A US2012182151A1 US 20120182151 A1 US20120182151 A1 US 20120182151A1 US 201113085439 A US201113085439 A US 201113085439A US 2012182151 A1 US2012182151 A1 US 2012182151A1
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- United States
- Prior art keywords
- resistor
- input terminal
- terminal
- server rack
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005303 weighing Methods 0.000 title description 2
- 239000003990 capacitor Substances 0.000 claims description 26
- 230000011664 signaling Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1485—Servers; Data center rooms, e.g. 19-inch computer racks
- H05K7/1498—Resource management, Optimisation arrangements, e.g. configuration, identification, tracking, physical location
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/62—Over or under weighing apparatus
Definitions
- the present disclosure relates to server racks, and particularly, to a server rack having a payload weighing function.
- Server racks are used for accommodating a number of blade servers. But the load-carrying capacity of a server rack is limited. When the weight of the blade servers exceeds the load-carrying capacity of the server rack, the server rack is at risk of being damaged.
- FIG. 1 is a schematic view of a server rack, according to an exemplary embodiment.
- FIG. 2 is one embodiment of a functional block diagram of the server rack of FIG. 1 .
- FIG. 3 is one embodiment of a schematic view of an amplifying circuit of the server rack of FIG. 1 .
- FIG. 4 is one embodiment of a microcontroller of the server rack of FIG. 1 .
- FIG. 5 is one embodiment of a display of the server rack of FIG. 1 .
- a server rack 100 is used for accommodating a number of blade servers 200 and includes a main body 10 , an electronic scale 30 , a display 50 , and an alarm 70 .
- the display 50 and the alarm 70 are electrically connected to the electronic scale 30 .
- the main body 10 is hollow and cuboid-shaped, and used for receiving the blade servers 200 therein.
- the main body 10 is positioned on a loading surface 300 , and includes a bottom surface 101 facing the loading surface 300 .
- Four supporting feet 11 are respectively fixed on four corners of the bottom surface 101 , and used for supporting the main body 10 .
- the supporting feet 11 can be made of light metal.
- the electronic scale 30 includes four pressure sensors 33 , four amplifying circuits 35 , and a microcontroller 37 .
- each pressure sensor 33 is positioned under a corresponding one of the supporting feet 11 to sense any loads supported by the feet 11 , and includes a first signal terminal 331 and a second signal terminal 332 used for outputting pressure signals.
- each amplifying circuit 35 is used for amplifying the pressure signal of the corresponding pressure sensor 33 , and includes a first operational amplifier 351 , a second operational amplifier 352 , a third operational amplifier 353 , a first resistor R 1 , a second resistor R 2 , a third resistor R 3 , a fourth resistor R 4 , a fifth resistor R 5 , a sixth resistor R 6 , a seventh resistor R 7 , an eighth resistor R 8 , a first capacitor C 1 , a second capacitor C 2 , a third capacitor C 3 , and a fourth capacitor C 4 .
- the first operational amplifier 351 includes a first negative input terminal 351 a , a first positive input terminal 351 b , and a first output terminal 351 c .
- the second operational amplifier 352 includes a second positive input terminal 352 a , a second negative input terminal 352 b , and a second output terminal 352 c .
- the third operational amplifier 353 includes a third positive input terminal 353 a , a third negative input terminal 353 b , and a third output terminal 353 c.
- the first negative input terminal 351 a is connected to the first signal terminal 331 through the first resistor R 1 .
- the first positive input terminal 351 b is connected to the first output terminal 351 c through the second resistor R 2 .
- the first output terminal 351 c is also connected to the third negative terminal 353 b through the third resistor R 3 .
- the first negative input terminal 351 a is also connected to the first positive input terminal 351 b through the first capacitor C 1 .
- the second positive input terminal 352 a is connected to the second signal terminal 332 through the fourth resistor R 4 .
- the second negative output terminal 352 b is connected to the second output terminal 352 c through the fifth resistor R 5 .
- the second output terminal 352 c is connected to the third positive input terminal 353 a through the sixth resistor R 6 .
- the second positive input terminal 352 a is connected to the second negative terminal 352 b through the second capacitor C 2 .
- the third positive input terminal 353 a is grounded through the seventh resistor R 7 .
- the third negative input terminal 353 a is connected to the third output terminal 353 c through the eighth resistor R 8 .
- the first positive input terminal 351 b is also connected to the second negative input terminal 352 b through a rheostat R 9 .
- the first negative input 351 a is grounded through the third capacitor C 3 .
- the second positive input terminal 352 a is grounded through the fourth capacitor C 4 .
- the first, second, third operational amplifiers 351 , 352 , 353 respectively include a voltage input terminal and a voltage output terminal.
- the voltage input terminal is connected to a direct current power supply VCC.
- the voltage output terminal is grounded.
- the resistance of the first resistor R 1 is equal to that of the fourth resistor R 4 .
- the resistance of the second resistor R 2 is equal to that of the fifth resistor R 5 .
- the resistance of the third resistor R 3 is equal to that of the sixth resistor R 6 .
- the resistance of the seventh resistor R 7 is equal to that of the eighth resistor R 8 .
- the capacitance of the first capacitor C 1 is equal to that of the second capacitor C 2 .
- the capacitance of the third capacitor C 3 is equal to that of the fourth capacitor C 4 .
- the resistances of the first resistor to the eighth resistor R 1 -R 8 respectively can be about 1 K ⁇ , 20 K ⁇ , 1 K ⁇ , 1 K ⁇ , 20 K ⁇ , 1 K ⁇ , 51 K ⁇ , 51 K ⁇ .
- the capacitances of the first capacitor to the fourth capacitor C 1 -C 4 respectively can be about 100 pF, 100 pF, 0.1 uF, 0.1 uF.
- the voltage of VCC can be about 10V.
- the third output terminals 353 c of the four amplifying circuits 35 respectively output an A/D1 signal, an A/D2 signal, an A/D3 signal, and an A/D4 signal.
- the microcontroller 37 is electrically connected to the four amplifying circuits 35 and the display 50 , and used for adding the output signals of the four amplifying circuits 35 to obtain the total weight of the main body 10 and the blade servers 200 .
- the microcontroller 37 includes an RA0 terminal, an RA1 terminal, an RA2 terminal, an RA3 terminal, an RC0 terminal, an RC1 terminal, an RC2 terminal, an RC3 terminal, an RC4 terminal, an RC5 terminal, and an RC6 terminal.
- the RA0-RA3 terminals are analog to digital (A/D) conversion terminals, and electrically connected to the third output terminals 353 c of the four amplifying circuits 35 .
- the RC0-RC6 terminals are input/output terminals, and electrically connected to the display 50 .
- the display 50 is positioned on the sidewall of the main body 10 , and is used for displaying the weight calculated by the microcontroller 37 .
- the display 50 is a crystal display, and includes an LCD CON0 terminal, an LCD CON1 terminal, an LCD CON2 terminal, an LCD CON3 terminal, an LCD CON4 terminal, an SDA terminal, and an SDL terminal.
- the LCD CON1-LCD CON4 terminals are input/output terminals.
- the LCD CON0-LCD CON2 terminals are respectively electrically connected to the RC0-RC2 terminals of the microcontroller 37 .
- the LCD CON3 terminal and the LCD CON4 terminal are electrically connected to the RC5 terminal and the RC6 terminal of the microcontroller 37 .
- the SDA terminal is a serial data terminal.
- the SCL terminal is a serial clock terminal.
- the SDA terminal and SDL terminal are electrically connected to the RC3 terminal and the RC4 terminal of the microcontroller 37 .
- the alarm 70 is positioned on the sidewall of the main body 10 , and electrically connected to the microcontroller 37 .
- the alarm 70 includes a memory 71 , a comparison unit 72 , and a buzzer 73 .
- a predetermined weight threshold is stored in the memory 71 and represents the total weight of the main body 10 and the maximum blade servers that the main body 10 can bear.
- the comparison unit 72 is used for comparing the calculated weight with the predetermined weight threshold.
- the buzzer 73 is used for alerting users when the calculated weight is larger than the predetermined weight threshold.
- the number of the supporting feet 11 can be other than four according to practical need. In yet other embodiments, the supporting feet 11 can be omitted, and the pressure sensors 33 positioned directly under the main body 10 . The number of the pressure sensors 33 can be varied according to number and placement of supporting feet.
- the weight of the supporting feet 11 can be tared before use.
Abstract
Description
- 1. Technical Field
- The present disclosure relates to server racks, and particularly, to a server rack having a payload weighing function.
- 2. Description of Related Art
- Server racks are used for accommodating a number of blade servers. But the load-carrying capacity of a server rack is limited. When the weight of the blade servers exceeds the load-carrying capacity of the server rack, the server rack is at risk of being damaged.
- Therefore, it is desirable to provide a server rack, which can overcome the above-mentioned limitations.
- Many aspects of the disclosures should be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure.
-
FIG. 1 is a schematic view of a server rack, according to an exemplary embodiment. -
FIG. 2 is one embodiment of a functional block diagram of the server rack ofFIG. 1 . -
FIG. 3 is one embodiment of a schematic view of an amplifying circuit of the server rack ofFIG. 1 . -
FIG. 4 is one embodiment of a microcontroller of the server rack ofFIG. 1 . -
FIG. 5 is one embodiment of a display of the server rack ofFIG. 1 . - Referring to
FIG. 1 andFIG. 2 , aserver rack 100 is used for accommodating a number ofblade servers 200 and includes amain body 10, anelectronic scale 30, adisplay 50, and analarm 70. Thedisplay 50 and thealarm 70 are electrically connected to theelectronic scale 30. - The
main body 10 is hollow and cuboid-shaped, and used for receiving theblade servers 200 therein. Themain body 10 is positioned on aloading surface 300, and includes abottom surface 101 facing theloading surface 300. Four supportingfeet 11 are respectively fixed on four corners of thebottom surface 101, and used for supporting themain body 10. In one embodiment, the supportingfeet 11 can be made of light metal. - The
electronic scale 30 includes fourpressure sensors 33, four amplifyingcircuits 35, and amicrocontroller 37. - Referring to
FIG. 3 , eachpressure sensor 33 is positioned under a corresponding one of the supportingfeet 11 to sense any loads supported by thefeet 11, and includes afirst signal terminal 331 and asecond signal terminal 332 used for outputting pressure signals. - Referring to
FIGS. 2-3 , each amplifyingcircuit 35 is used for amplifying the pressure signal of thecorresponding pressure sensor 33, and includes a firstoperational amplifier 351, a secondoperational amplifier 352, a thirdoperational amplifier 353, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. - The first
operational amplifier 351 includes a firstnegative input terminal 351 a, a firstpositive input terminal 351 b, and afirst output terminal 351 c. The secondoperational amplifier 352 includes a secondpositive input terminal 352 a, a secondnegative input terminal 352 b, and a second output terminal 352 c. The thirdoperational amplifier 353 includes a thirdpositive input terminal 353 a, a third negative input terminal 353 b, and a third output terminal 353 c. - The first
negative input terminal 351 a is connected to thefirst signal terminal 331 through the first resistor R1. The firstpositive input terminal 351 b is connected to thefirst output terminal 351 c through the second resistor R2. Thefirst output terminal 351 c is also connected to the third negative terminal 353 b through the third resistor R3. The firstnegative input terminal 351 a is also connected to the firstpositive input terminal 351 b through the first capacitor C1. The secondpositive input terminal 352 a is connected to thesecond signal terminal 332 through the fourth resistor R4. The secondnegative output terminal 352 b is connected to the second output terminal 352 c through the fifth resistor R5. The second output terminal 352 c is connected to the thirdpositive input terminal 353 a through the sixth resistor R6. The secondpositive input terminal 352 a is connected to the secondnegative terminal 352 b through the second capacitor C2. The thirdpositive input terminal 353 a is grounded through the seventh resistor R7. The thirdnegative input terminal 353 a is connected to the third output terminal 353 c through the eighth resistor R8. The firstpositive input terminal 351 b is also connected to the secondnegative input terminal 352 b through a rheostat R9. The firstnegative input 351 a is grounded through the third capacitor C3. The secondpositive input terminal 352 a is grounded through the fourth capacitor C4. - The first, second, third
operational amplifiers - In one embodiment, the resistances of the first resistor to the eighth resistor R1-R8 respectively can be about 1 KΩ, 20 KΩ, 1 KΩ, 1 KΩ, 20 KΩ, 1 KΩ, 51 KΩ, 51 KΩ. The capacitances of the first capacitor to the fourth capacitor C1-C4 respectively can be about 100 pF, 100 pF, 0.1 uF, 0.1 uF. The voltage of VCC can be about 10V.
- The third output terminals 353 c of the four amplifying
circuits 35 respectively output an A/D1 signal, an A/D2 signal, an A/D3 signal, and an A/D4 signal. - Referring to
FIG. 4 , themicrocontroller 37 is electrically connected to the four amplifyingcircuits 35 and thedisplay 50, and used for adding the output signals of the four amplifyingcircuits 35 to obtain the total weight of themain body 10 and theblade servers 200. Themicrocontroller 37 includes an RA0 terminal, an RA1 terminal, an RA2 terminal, an RA3 terminal, an RC0 terminal, an RC1 terminal, an RC2 terminal, an RC3 terminal, an RC4 terminal, an RC5 terminal, and an RC6 terminal. The RA0-RA3 terminals are analog to digital (A/D) conversion terminals, and electrically connected to the third output terminals 353 c of the four amplifyingcircuits 35. The RC0-RC6 terminals are input/output terminals, and electrically connected to thedisplay 50. - Referring to
FIG. 5 , thedisplay 50 is positioned on the sidewall of themain body 10, and is used for displaying the weight calculated by themicrocontroller 37. In this embodiment, thedisplay 50 is a crystal display, and includes an LCD CON0 terminal, an LCD CON1 terminal, an LCD CON2 terminal, an LCD CON3 terminal, an LCD CON4 terminal, an SDA terminal, and an SDL terminal. The LCD CON1-LCD CON4 terminals are input/output terminals. The LCD CON0-LCD CON2 terminals are respectively electrically connected to the RC0-RC2 terminals of themicrocontroller 37. The LCD CON3 terminal and the LCD CON4 terminal are electrically connected to the RC5 terminal and the RC6 terminal of themicrocontroller 37. The SDA terminal is a serial data terminal. The SCL terminal is a serial clock terminal. The SDA terminal and SDL terminal are electrically connected to the RC3 terminal and the RC4 terminal of themicrocontroller 37. - Referring to
FIG. 2 , thealarm 70 is positioned on the sidewall of themain body 10, and electrically connected to themicrocontroller 37. Thealarm 70 includes amemory 71, acomparison unit 72, and abuzzer 73. A predetermined weight threshold is stored in thememory 71 and represents the total weight of themain body 10 and the maximum blade servers that themain body 10 can bear. Thecomparison unit 72 is used for comparing the calculated weight with the predetermined weight threshold. Thebuzzer 73 is used for alerting users when the calculated weight is larger than the predetermined weight threshold. - In other embodiments, the number of the supporting
feet 11 can be other than four according to practical need. In yet other embodiments, the supportingfeet 11 can be omitted, and thepressure sensors 33 positioned directly under themain body 10. The number of thepressure sensors 33 can be varied according to number and placement of supporting feet. - It should be noted that in any embodiments, the weight of the supporting
feet 11 can be tared before use. - It will be understood that the above particular disclosures and methods are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous disclosures thereof without departing from the scope of the disclosure as claimed. The above-described disclosures illustrate the scope of the disclosure but do not restrict the scope of the disclosure.
Claims (14)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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CN201110021433 | 2011-01-19 | ||
CN201110021433.1 | 2011-01-19 | ||
CN2011100214331A CN102612279A (en) | 2011-01-19 | 2011-01-19 | Server cabinet |
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US20120182151A1 true US20120182151A1 (en) | 2012-07-19 |
US8471721B2 US8471721B2 (en) | 2013-06-25 |
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